GroupWare   
http://www.altn.com

MDaemon GroupWare unlocks the collaborative functions of Microsoft Outlook using MDaemon as the mail server platform. Outlook users can share Calendar, Tasks, Contacts, Notes, and Journal folders without the expense or expertise required by Microsoft Exchange Server. Features include user configurable permissions where GroupWare users has control over the permissions of which folder(s) they wish to share with other users, WorldClient (MDaemon's web-based email client) will allow you to see items in your Outlook calendar from anywhere, and GroupWare licensing is independent of your MDaemon license size.

MDaemon   
http://www.altn.com

MDaemon , Windows-based email server software, contains full mail server functionality and control with a strong emphasis on security to protect your email communication needs. MDaemon features include top-notch antispam security features; seamless integration with AntiVirus for MDaemon plug-in; built-in groupware functionalities for sharing folders, tasks, contacts, and address; separately licensed plug-in for Outlook users to access groupware functionalities using MDaemon as the mail server and groupware platform; secure instant messaging; free web-based email client; remote administration tool; central address book repository; and much more! MDaemon 8.1 new feature includes the first implementation of DomainKeys Identified Mail (DKIM) for the Microsoft Windows platform. DKIM validates the sender address and message integrity of each email received. MDaemon creates outbound signatures and validates inbound messages signed with DKIM. Read Alt-N's published white paper on DKIM and its implementation in MDaemon at http://www.altn.com/support/white_papers.asp. In addition to DKIM, MDaemon 8.1 includes support for Greylisting, a relatively new spam fighting technique which involves deferring the initial acceptance of a new mail message from unknown senders and tells the sending email server to try again later. When the sending server tries a second time - which most spam sources will not do - MDaemon will accept it. Exception options and white lists can exempt trusted senders from greylist processing. MDaemon 8.1 builds on the groupware, security and administrative improvements made available with MDaemon 8.0. MDaemon now includes free groupware functions, including shared calendars, contacts and task lists. It also continues to lead the industry in email security, professional fine-tuning and beginner ease of use.

RelayFax Server   
http://www.altn.com

RelayFax is a powerful email-to-fax and fax-to-email fax server. RelayFax Pro automates the process of sending, receiving and managing your network fax traffic. By integrating into existing email systems, RelayFax provides full faxing capabilities from your desktop. This fax software will prove cost effective and will increase productivity! RelayFax features include Caller ID Fax Routing - Using Inbound Fax Rules, RelayFax supports routing of faxes based upon Calling Number Display data (commonly called Caller ID); Outlook Address Book Integration - Client can use the shared contacts that are set up in your Outlook Address book so you don't have to maintain multiple address books; OCR Inbound Routing - Using Optical Character Recognition (OCR), RelayFax checks inbound faxes with your account database to utilize email forwarding and custom rules; SMTP Client - This application gives users a simple, yet complete, interface with which to send faxes; TWAIN Device Support - RelayFax is able to interface with TWAIN devices, such as scanners and digital cameras, quickly and easily; Fax Scheduling - Allows faxes to be assigned a specific date and time to be sent; Fax Broadcast Wizard - Allows easy setup and send the same fax to large numbers of recipients; Attachment Faxing - Allows RelayFax to extract and fax attachments as true documents; Custom Cover Sheets - Using a cover page editor, each individual user has the option of selecting the default cover page, as set by the Administrator, or using another; and Ring Count Delay - Sets the number of rings before a call is answered to facilitate receiving Caller ID information or using the line for voice calls; fax engine to support many more fax modems (Brooktrout, Gammalink, Bicom, Dialogic, and NMS boards), CAPI 2.0 support, DID routing support, OCR printer driver, Windows dialing rules support, PDF and PNG document support, and much more.

Ability Mail Server   
http://www.code-crafters.com

Ability Mail Server is an advanced, secure and high performing mail server. Featuring SMTP, POP3, IMAP4, WebMail, Remote Admin, LDAP, SSL, SPAM Protection with Bayesian and RBL filters, Antivirus Protection, Content Filtering, POP3 retrievals, ODBC, mailing lists, static routing, aliases, redirections, auto-responses, multiple folders, address books and much more. Combines maximum functionality with ease of use.

Ocean Mail Server   
http://www.codeocean.com

Ocean Mail Server is a robust and intuitive mail server with many advanced features. Users can access their mail using POP3, IMAP4 or the flexible web mail interface from any web browser. Each user can also configure an extensive set of individual account options via the web mail interface which include address book contacts, signatures, POP3 retrievals and anti-spam filtering. A full web remote administration interface is available to allow the server to be managed from any location. Strong mail filtering can be achieved using the built in anti-spam, antivirus and content filtering facilities. Other features include mailing lists, LDAP, ODBC and a range of tools and setup wizards to make configuration and diagnostics as simple as possible.